You shouldn’t feel bad. You can suck a cough sweet and can do it quietly! I’ve started to have more courage to approach people, but sometimes mentioning it to others helps. With office gossip, the person usually doing it finds out soon enough! An approach to at least consider. I have a tin of coppers with notices on it with triggers and rattle it when triggered. I can now cope finally. Last few years have been an absolute torture. I forget how bad it was!